4-1/2" round filters are typically used with or without a sun shade when you don't want to use a matte box.

Here's a partial list of the filters available at CQ in this size. The full product listing is coming.

• 85 & 85 ND's
• Black Promists
• Classic Softs
• Clears
• Diopters & Split Diopters
• Green Filters (for black & white)
• Harrison Corals
• Schneider Platinum IR ND's (thru 1.2)
• ND Filters
• Orange Filters (for black & white)
• Polarizers & Polarizer/85 Combo
• Red Filters (for black & white)
• Soft EFX Filters
• Stars - 4, 6 & 8 point
• Ultracons
• White Promists
• Yellow Filters (for black & white)